EP2745165B9 - Optionally transferable optical system with a reduced thickness - Google Patents

Optionally transferable optical system with a reduced thickness Download PDF

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Publication number
EP2745165B9
EP2745165B9 EP12768923.0A EP12768923A EP2745165B9 EP 2745165 B9 EP2745165 B9 EP 2745165B9 EP 12768923 A EP12768923 A EP 12768923A EP 2745165 B9 EP2745165 B9 EP 2745165B9
Authority
EP
European Patent Office
Prior art keywords
focusing elements
optical system
arrangements
reflective
concave reflective
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12768923.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2745165A1 (en
EP2745165B1 (en
Inventor
Gregory R. Jordan
Samuel M. Cape
Scott K. Palm
Jonathan D. GOSNELL
Caroline B. KENNEDY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Visual Physics LLC
Original Assignee
Visual Physics LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Visual Physics LLC filed Critical Visual Physics LLC
Priority to EP17176980.5A priority Critical patent/EP3244254B1/en
Priority to EP21206962.9A priority patent/EP3970957A1/en
Publication of EP2745165A1 publication Critical patent/EP2745165A1/en
Application granted granted Critical
Publication of EP2745165B1 publication Critical patent/EP2745165B1/en
Publication of EP2745165B9 publication Critical patent/EP2745165B9/en
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00278—Lenticular sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/4205—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations are relevant
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0012—Arrays characterised by the manufacturing method
    • G02B3/0031—Replication or moulding, e.g. hot embossing, UV-casting, injection moulding
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors

Definitions

  • Focusing elements contemplated for use in the present invention include concave reflective focusing elements. Examples of such focusing elements are described in U.S. Patent No. 7,333,268 to Steenblik et al. , U.S. Patent No. 7,468,842 to Steenblik et al. , and U.S. Patent No. 7,738,175 to Steenblik et al. , which are fully incorporated herein by reference as if fully set forth herein.
  • a semitransparent (or partially metalized) metal layer can be provided instead of a fully opaque reflecting metal layer.
  • a semitransparent (or partially metalized) metal layer, or a high refractive index layer can be provided instead of a fully opaque reflecting metal layer.
  • multiple layers of vapor deposited material may be used to provide reflectivity, for example, color-shifting interference coatings formed from dielectric layers, or from a combination of metal and dielectric layers such as metal/dielectric/metal may also provide the necessary reflectivity.
  • Image icons contemplated for use in the present invention are structured image icons (i.e., image icons having a physical relief).
  • the image icons are optionally coated and/or filled voids or recesses ( e.g ., voids in a substantially planar structure, the voids optionally filled or coated with another material), while in another exemplary embodiment, the image icons are formed from raised areas or shaped posts ( e.g ., raised areas in a substantially planar structure). Examples of structured image icons are also described in U.S. Patent No. 7,333,268 to Steenblik et al. , U.S. Patent No. 7,468,842 to Steenblik et al. , and U.S. Patent No. 7,738,175 to Steenblik et al.
  • the present inventors have discovered that tailoring the focal length of the focusing elements in the inventive system serves to obviate the need for an optical spacer. It was found that the arrangement(s) of image icons may intersect the depth of focus of the arrangement(s) of focusing elements without the need for an optical spacer, resulting in a thinner, more streamlined system capable of presenting at least one synthetic image. Moreover, and as will be explained in more detail below, the present inventors have also discovered that when certain focusing element designs are used, it is possible to transfer the inventive system to a value document or product without a base film or carrier substrate forming any part of the transferred system. Both discoveries have resulted in a synthetic image presentation system having a decrease in cross-sectional thickness, a suitability as a surface-applied security feature, and a reduced risk of interlayer delamination.
  • the inventive system is a refractive optical system 10 that further includes a support or carrier substrate 12.
  • a synthetic image presentation system 14 is built on one side of the carrier substrate 12.
  • the carrier substrate 12 does not contribute to the optical functionality of the system. In other words, synthetic images will be presented regardless of the presence or opacity of the carrier substrate 12.
  • An exemplary method of manufacture is to form the icons as voids in a radiation cured liquid polymer (e.g ., acrylated urethane) that is cast from an icon mold against a base film ( i . e ., carrier substrate 12), such as 75 gauge adhesion-promoted PET film, then to fill the icon voids with a submicron particle pigmented coloring material by gravure-like doctor blading against the polymeric icon surface, then to solidify the fill by suitable means (e.g ., solvent removal, radiation curing, or chemical reaction), then to cast lenses against the filled icons by bringing the icon side of the base film against a lens mold filled with radiation curable polymer, and solidifying the polymer by application of ultraviolet (UV) light or other actinic radiation.
  • a radiation cured liquid polymer e.g ., acrylated urethane
  • a base film i . e ., carrier substrate 12
  • suitable means e.g ., solvent removal, radiation cu
  • micro-scale systems for example, in the form of a security strip, thread, patch, or overlay:
  • the inventive system is a transferable concave reflective optical system 58 that further includes, among other layers, a release liner 60, which is made up of carrier substrate 62 and release coating 64. While FIG. 5 relates to a transferable concave reflective optical system, the above described convex reflective optical system is also transferable.
  • the carrier substrate 62 e.g ., a UV transmissive PET film layer with a thickness between 15 and 50 microns
  • the carrier substrate 62 would contain a coating that has good adhesion at ambient temperature, but softens and releases with the application of heat and pressure at the time of lamination in, for example, a desktop document laminator, or on an industrial foiling machine, which apply heat and pressure in a continuous web process.
  • suitable functional release coatings include, but are not limited to, low surface energy materials such as polyethylene, polypropylene, silicone, or hydrocarbon waxes.
  • pressure sensitive adhesives whose bond strengths weaken considerably at elevated temperatures, formulated with tackifying resins and monomers with the appropriate glass transition temperature (Tg), to provide release at the desired temperature.
  • the reflective layer is a conformally coated reflective layer prepared using aluminum, chrome, copper, gold, nickel, silver, stainless steel, tin, titanium, zinc sulfide, magnesium fluoride, titanium dioxide, or other material providing the desired level of reflectivity. This layer may be applied at thicknesses ranging from about 50 nanometers to about 2 microns using physical vapor deposition (PVD), chemical vapor deposition (CVD), or other suitable process.
  • PVD physical vapor deposition
  • CVD chemical vapor deposition
  • Optional protective coating 72 which serves to protect the reflective layer, may be prepared from energy curable acrylates (e.g ., energy curable acrylates containing organic or inorganic fillers with pigmenting or reinforcing properties), solvent or water based coatings such as acrylics, epoxies, EVAs, polyurethanes, PVAs, and the like, and is applied at thicknesses ranging from about 1 to about 10 microns, while the adhesive layer may be prepared from thermally activated adhesives ( i .
  • energy curable acrylates e.g ., energy curable acrylates containing organic or inorganic fillers with pigmenting or reinforcing properties
  • solvent or water based coatings such as acrylics, epoxies, EVAs, polyurethanes, PVAs, and the like
  • the adhesive layer may be prepared from thermally activated adhesives ( i .
  • the resulting film-like structure can be handled/converted/transferred like a traditional transfer film.
  • the structure may be brought into contact with a target substrate (e.g ., currency paper, ID document, or product packaging), and upon the application of heat and pressure, the release liner can be completely peeled away, leaving only the synthetic image presentation system on the final substrate.
  • a target substrate e.g ., currency paper, ID document, or product packaging
  • the structured image icons used in the inventive diffractive optical system are similar to those used in the above described refractive and reflective systems.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Credit Cards Or The Like (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Laminated Bodies (AREA)
EP12768923.0A 2011-08-19 2012-08-17 Optionally transferable optical system with a reduced thickness Active EP2745165B9 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17176980.5A EP3244254B1 (en) 2011-08-19 2012-08-17 Method of manufacturing a transferable optical system with a reduced thickness
EP21206962.9A EP3970957A1 (en) 2011-08-19 2012-08-17 Method of manufacturing a transferable optical system with a reduced thickness

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161525239P 2011-08-19 2011-08-19
PCT/US2012/051394 WO2013028534A1 (en) 2011-08-19 2012-08-17 Optionally transferable optical system with a reduced thickness

Related Child Applications (3)

Application Number Title Priority Date Filing Date
EP21206962.9A Division EP3970957A1 (en) 2011-08-19 2012-08-17 Method of manufacturing a transferable optical system with a reduced thickness
EP17176980.5A Division-Into EP3244254B1 (en) 2011-08-19 2012-08-17 Method of manufacturing a transferable optical system with a reduced thickness
EP17176980.5A Division EP3244254B1 (en) 2011-08-19 2012-08-17 Method of manufacturing a transferable optical system with a reduced thickness

Publications (3)

Publication Number Publication Date
EP2745165A1 EP2745165A1 (en) 2014-06-25
EP2745165B1 EP2745165B1 (en) 2017-10-11
EP2745165B9 true EP2745165B9 (en) 2018-07-18

Family

ID=46970382

Family Applications (3)

Application Number Title Priority Date Filing Date
EP12768923.0A Active EP2745165B9 (en) 2011-08-19 2012-08-17 Optionally transferable optical system with a reduced thickness
EP17176980.5A Active EP3244254B1 (en) 2011-08-19 2012-08-17 Method of manufacturing a transferable optical system with a reduced thickness
EP21206962.9A Pending EP3970957A1 (en) 2011-08-19 2012-08-17 Method of manufacturing a transferable optical system with a reduced thickness

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP17176980.5A Active EP3244254B1 (en) 2011-08-19 2012-08-17 Method of manufacturing a transferable optical system with a reduced thickness
EP21206962.9A Pending EP3970957A1 (en) 2011-08-19 2012-08-17 Method of manufacturing a transferable optical system with a reduced thickness

Country Status (13)

Country Link
US (1) US10890692B2 (enrdf_load_stackoverflow)
EP (3) EP2745165B9 (enrdf_load_stackoverflow)
JP (4) JP2014524600A (enrdf_load_stackoverflow)
KR (1) KR101948363B1 (enrdf_load_stackoverflow)
CN (1) CN104024921B (enrdf_load_stackoverflow)
AU (1) AU2012299113B2 (enrdf_load_stackoverflow)
BR (1) BR112014003888A2 (enrdf_load_stackoverflow)
CA (1) CA2845610C (enrdf_load_stackoverflow)
ES (2) ES2652034T3 (enrdf_load_stackoverflow)
IN (1) IN2014CN02023A (enrdf_load_stackoverflow)
MX (1) MX372840B (enrdf_load_stackoverflow)
RU (1) RU2641316C9 (enrdf_load_stackoverflow)
WO (1) WO2013028534A1 (enrdf_load_stackoverflow)

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ES2652034T3 (es) 2018-01-31
MX2014001926A (es) 2014-08-21
KR20140053328A (ko) 2014-05-07
KR101948363B1 (ko) 2019-04-22
CN104024921B (zh) 2018-09-21
RU2641316C9 (ru) 2019-03-21
MX372840B (es) 2020-06-24
JP7381023B2 (ja) 2023-11-15
AU2012299113B2 (en) 2015-05-07
RU2641316C2 (ru) 2018-01-17
JP2021005092A (ja) 2021-01-14
ES2902474T3 (es) 2022-03-28
RU2014108957A (ru) 2015-09-27
IN2014CN02023A (enrdf_load_stackoverflow) 2015-05-29
US20140376091A1 (en) 2014-12-25
BR112014003888A2 (pt) 2017-03-21
EP3244254A3 (en) 2018-03-07
CA2845610C (en) 2020-08-25
EP2745165A1 (en) 2014-06-25
WO2013028534A1 (en) 2013-02-28
AU2012299113A1 (en) 2014-03-06
JP2022093467A (ja) 2022-06-23
EP3244254B1 (en) 2021-12-15
EP2745165B1 (en) 2017-10-11
JP2014524600A (ja) 2014-09-22
US10890692B2 (en) 2021-01-12
JP2019070826A (ja) 2019-05-09
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